Past simple/present perfect/present perfect continuous

I lived in London for 3 years. (Simple past. You no longer live there.)
I've been living in London for 3 years. (Present perfect continuous. You still live there.)
I've lived in London for 3 years. (Present perfect. You may or may not still live there, depending on the context.)

Anonymous1. I lived in London for 3 years.2. I've lived in London for 3 years.3. I've been living in London for 3 years.

The three years in 1 can be three years some time ago, for example, 1991-1993 or 1999-2001.

The three years in 2 and 3 are the most recent three years. 2010-2012.

There is no difference in meaning between 2 and 3, though s

CalifJimThere is no difference in meaning between 2 and 3

Normally, no. But wouldn’t you say there could be a difference in certain contexts?

Aspara Guswouldn’t you say there could be a difference in certain contexts?

Yes, but I don't think the OP is ready for the whole five chapters on this topic just yet.

CalifJimI don't think the OP is ready for the whole five chapters on this topic just yet.

That’s a good point.

Present Perfect is often used to talk about personal experience ... I'm wondering if I have lived in London for 3 years and I lived in London for 3 years are really that much different.

We say:

I've been to Greece.
I've read that book.
I've seen that movie.

Perfect StrangerI'm wondering ... I have lived in London for 3 years

Yes. This one is a bit ambiguous as to whether it's the three more recent years or just any three years in the past.

CJ

Perfect StrangerI'm wondering if I have lived in London for 3 years and I lived in London for 3 years are really that much different.

They are, more often than not. Context would usually make the meaning clear.